phelps



(No Medal.)

. L. J; PHELPS. DUBLBXING RAILWAY TELBGRAPHS.

Patented Oct.

2 Sheets-Sheet 1.

INVENTOH grams? (No Model.) 2 swam-sheen 2. LPS.

DUPLEXING RAILWAY TELEGEAPHS.

L.-J.IPHE

Pate11tad 0st 26,1886.

\ INVENTOR m ww/fi ATTORNEY UNITED STATES PATENT "Swim.

OF NEW YURK, 1% Y 7 m LIPLEMEN H FlAlLWAY TELELGRAFHS.

To .611 whom it may concern:

Be itknown that I, LUQIUE; J. PHELPS, a citizen of the U nitarl States, 721ml a resident at New Ynrk, in the mummy of New York mull-State of New Ymk, have invented flflltitill ntwaml useful Impmvements in Duplmtlng; RLtilway Eulw graphs of which the tollnwing it a EE'PWSiflCHH timL.

.Tht uhjPct. of my invntion la tn pmwille at mews wlmrvally telegraphic mmmuulmtlnn may [m maintained with it gnawing vlzliltle suxcl fm' inst'mtm as a railway umgwlwtlmr in nmtmn or at Willi- UM)?- l'lne equlpplallw time llilllllll. ttlfigrmghit apps,- mtus sucll, We; at Momma apparatus-withnt lnte'r'l'm'tme with I Mmultauemmuse ml the llrlmrte m1. pzt'n'alzula an the line.

My lullventitm, it tlttlguml 11mm pm" to provide it mtamm wlnmmhytlm ill? cnmmmnic' m with tllt lfil'ttilll 112mg; lm malt I lllmtlnn signals, wlnlle at the mtme tlmetmrmltting Emil lint t0 be 115ml for ordinary tgllzgzgmpl'n pm puseitl Byvllamtlmltign l? lmmnsigmfla wlmt alt-amen ttmy pmrtl m1 lllllll], t'm" iuttzmtsa, the data and (lattes, will? tlut ltliflr'tt anilplmlmt---euch lGOITISlEtlLS of 1a tmies 0t @lEBlillflitl ptllmttlmm Waves, 01* vlbmtioml, wlmtlcl Etltt%ll1?tl1fi1g--lih at is, of alternately opposite pQlmitw-mr whether all 0f mam mlmitym lllcut; 'vllmttlmltmay racm with anllialmlt tfmpltlity tu pmfllmm tlnt. am satium 0f 0, nmtlimtl tmw, twill thilt is. the pmferr'ml plan 0t 03g titan, "lit wnultl, hummer, be within 'lilltl iIlW lcm tn; lemma tlm vllm tipmt m umtltnltltlmm m 11mm with at speed illntlmfllmlmlt tn mllme l'ltlllfi'iflltl tout lln my mute, t UWflVlh-l, tlmgt' tllmulll @le'mtly mpltl tn give a sctt'ltt"utwlln'tltlmm n (llttlnnt, til pulsutl 011s lb well closu'le, m tlm tltmlfilllittillg" 'k'ayur other devalue emplojmnl tlm bllfitllE-lllllli ter ,01" controllen wlmmzlly the arbitrary gig- Tlm navel lem'ullilmtions forming my uresentmveulamm will he dcsm'llmcl, in mmmectton mm the zmcmupmmylng lfllmwingm, mull will than bemore m mtlllmtlly zl'enltetlin the claims,

In the dm'wings- Figure Cl. it diagram m,

luvmtiom fl lllmltmtm lt mmllllutttltm in mm 'mtl 11 MW taltg mph 1 fmm the Patent Nu. 3El1fid2fi, dated Uctober 24:3, 1886.

Burial No. 201009. (No mndcl.)

of vibratmr tdaptetl to produce the elactrical tificial resistance in the llnemlmuit.

Y Iltefel'rlng t0 Fig, 1, L indicates an nrdinat'y Mame 011* other telegraph line or lllll'mllfi emriedl cm putts m: atherwise suppurtatl parallel to a line at" railway, tn its t0 be in suilalltlt in ductive pmxlmlty to a talegr rtph apparatus; mounted my a which: tilldIt ls indlclttadl at E. Snell apparatus; it to be cumbimecl with fllfiViKZBS *wlmreby tlm Blmtrlml pulsatlonmpu the, line 1112137. be llildmztively transltrmtl toftlw valliclm 110 be them remaivetl an a Equitable lmttumatlt. A. device suitable for this in my prim Pt'ttel'll] N0. $122,596., though in. tlw 19mm 0f tlm principle 0t mlt'l'eutlmrwtlon I shown in, my Patent 13M. lilfll lll'l'.

llll the pmsent mmm lblltf vehlmle 33 la shown with it mndmzmm arranged at tlutmilmtl in the first at my patent; mentiomdmmtl c021 nected with a renewal, fl, cmmisting, meter Qlihfiit' lustmnmltt ewnaltive tnwea-la; elentric entrant-ts. The transmitter on the vehicle may enusist 0f umurtllnary'Mum c-z key, K adaptml tions from it battery, L B, tl'lmuglm ftlm com du ctolr that it parallel t0 the lllflfi L. Thwm'ihrtltmr ll'flilfltttbillg up the fllllfidblilflllfl m" vibratimlmmlgr'lm all. may dfik llfifilillldn 'ltlmtrtlmw'n consists; m an m-tlinmty ttlmtrwmztgnetic tibral lmlmlml in the @lmuit M" tltsa 10ml hzttttry the latter are Maw iyrwlwlltd in tlml citmo that when tlmm'mztturfi is attracted vibrations on the circuit by controlling an arput'pma is desc wib erl may employ the prlxmipla ul tmtlc llltlmtlmn to control the pflsaalge of ppli'satimm or vibmtot; mmlsting at an @lentmqnagmt Wl'lUFtB mils;-

ttndlwlmst armmtmrwlvaver and "melt: (mutant-l tlw cum-wt ol'lilte battery is illltfiUl'lIlljltQll but m mutt: stitbration-signals.

. to the car by are included in the line-circuit with a generator of electricity, M-B, consisting of the ordinary galvanic battery that serves to charge said line, and is controlled by the operation of the keys in the ordinary and well-known way. In a shunt or branch around the Morse keys respectively are placed condensers O 0, whose function is to providea path for the vibration-signals on the line whenever the line-circuit is interrupted at the contacts of the transmitter K. The condensers C also serve to prevent the very suddenrises and falls of tension on theline produced by the operation of the keys K, and therefore act in a manner to reduce the violence of the sounds in the telephone-receivers employed for reading the vi- At the station A, which is the transmitting-station for the vibration-signals, and which may be, for instance, a traindispatchers ofiice, is located the apparatus for transmitting and receiving messages from and vihrationsignals, so called.

.To produce these vibration-signals I employa suitable vibrator, whose contacts serve to control the passage onto the line of a section of battery, or, which is the known equivalent,

- serve to throw an artificial resistance into and and the transmitters serve to make and out of the circuit of the battery M B, thus producing changes of tension on the line corresponding in their rate of 'recurrence to the rate of movement of the vibrator.

In Fig. 1, M B"indicate a section of battery which, by the operation of a vibrator, V, may be caused to tlow intermittently over the linecircuit in conjunction with the battery MB. The vibrator is in this instance arranged to alternately make and break'a shunt for the battery M B*, and in the shunt is included a transmitting-key, K", so that when the key is closed the operation of the vibrator 'will produce the pulsations or vibrations on the circuit by throwing the battery M B into and out of circuit in obvious way. The vibrator illustrated is shown as an electros-magnetic vibrator-that is to say, one that is kept in operation by an clectro-inagnet operating on an armature-lever whose movements serve to break and make the path including the coils of the magnet.

At the station A the receiver of vibrationsign'als is indicated at T, and consists, preferably, of an ordinary telephone-receiver.- A switch, 8, serves to shunt the telephone-receiver at pleasure.

In the operation of the apparatus described for the purpose of communicating between sta-' tions B D, the receivers and transmitters at said stations are used in the ordinary way, break the circuit of the battery M B M B over said line. \\'hen the apparatus atstation A is used at the same time for the purpose of communicating with a train, the section of battery M B is thrown into vibration on the circuit, and by induction produces on the car-circuit similar waves or pulsations that operate the telephonetaining the battery M B,

receiverT on which the messages from station A are read. I t, during the occurrence of a series of vibrations, a transmitter, K, atastaton, B or D, is open, the pulsations or vibrations produced by the vibrator will find circuit through the condenser around the keythat is for the time open. If the key K be closed in the operation of sending a message to another station on the line L, and if, at the same time, the vibrator at station A. be in operation, the section of battery M. B" will be alternately taken ofiand placed" onto the circuit; but the line will always be charged by the section of bat tery M B.

The operation of the devices in transmitting a message from the vehicle is obvious. The vibrations on the car-circuit are'inductively transferred to the line, and find their way to the telephone T at station A, over said line,'and through the transmitters K, when closed, or through the condensers 0, when the circuit at the transmittersKis open. Instead-of arranging the battery and "ibrator in the manner illustrated in Fig, 1, I sometimes prefer to arrange it after the manner shown in Fig. 2. In this instance the battery MB,-that charges the line for the Morse stations B D, is

connected into he line-circuit through resistanee'O. and the battery into vibration, is connected to the line by a separate branch through the vibrator V and the key K. The resistance Os'erves-toequalize the resistance of the two branches containing the batteries M B M B. Whenever the battery M B is put to line by the operation of the vibrator, there is a momentary increased flow of current on the line, which immediately ceases on the interruption of the branch conso that the current is-restored to the normal amount produced by the current of battery MB acting alone.

By the operation of the battery M B, controlled by the vibrator and the transmittingkey, the vibration-signals are produced and are transferred to the car in obvious manner. During such operation the stations B D can communicate with one another through the action of the keys upon the flow of current produced from bat-teryM B, and at the same time there is no interference from the operation of.

the keys K with the transmission of the vibration-signals to and from the vehicle over the same line-circuit L.

I have described ways of producing the vibrations on the circuit by means of a section of battery controlled by the vibrator and key; but it is obvious that the changes of current on the circuit could be produced in the wellknown equivalent manner by the action of an artificial resistance placed into and out of the lint circuit, and operating, when in circuit, to reduce the tension of the current from the charging-battery M B. Such an arrangement is indicited in Fig. 3, where the artificial resistance is indicated at W, and is included in the direct-line circuit L. The vibrator is M B, that is thrown placed. in the shunt around said resistance, so

.plcte the circuit between two springs, b b, in one position of the parts and to interrupt the cir cuit when removed to another position. The shunt controlled by said vibrator is also controlled by the transmitting-key K,'whicl1 is employed in transmitting messages by the vibration-signals in obvious way.

In Fig. 4 I have shown another form ot'vi brator adapted to control the shunt around the artificial resistance. In this instance the vibrator is what is known as an electro mag netic vibrator, and consists of an electromagnet whose coils, armature, and backrontact-stop are in a local circuit with a battery, M B, While another stop for said armaturelever serves to complete the shunt around the resistance \V in obvious nanner.

The transmitter K controls the flpelfifion of the vibrator and the production of the electric vibrations on theline by controlling the circuit of'the local battery that operates the vibrator. The operation of the devices will be evident to any one skilled in the art.

operation of the vibrator and the battery or its equivalent, as set forth.

2. The combination, substantially as de scribed, of a line, L, carried parallel to the pathof; a vehicle, apparatus on the latter forsending and receiving messages by induction to and from the line, a battery, M B, charging the line-circuit, telegraphtransmitting apparatus at two or more stations, B D, connected into the direct-line circuit, condensers shunting said apparatus, a supplemental battery or section of battery, or its equivalent, as described, at a station, A, a vibrator controlling the circuits of the same, and a transmittingkey, K, whereby vibration-signals may be sent to the vehicle over the line L, as and for the purpose described.

Signed at New York, in the county of New York and State of New York, this 2d day of July, A. D. 1886 LUOIUS J. PHELPS.

\Vitnesses:

WM. H. GAPEL, W M. HENRY GARDINER.

It is hereby certified that Letters Patent N 0. 351,525, granted October 26, 1886,11p0n the'application of Lucius J. Phelps, of New York, New York, for an improvement in "Duplexing Railway Tolegmphs, was erroneously issued to said Phelps; that the said Letters Patent should have been issued to The Railway Telegraph Company of New York,

the said Railwny Telegraph Company being the assignee of the entire interest in said iuyuntion; and that the said Letters Patent slmuld be read with this correction therein tliatthe same may conform to the record of the ease in the Patent Oflicc.

Signed, GOUtltGlSigIlEd, and scaled this 16th day of November, A. D. 1886.

[SEAL] D. L. HAWKINS,

Acting Secrgtary of the I nfcm'or. Counteraigned: '4'

R B. TAHOE,

Acting Commissioner of Patents. 

